Novel loci for field resistance to black-streaked dwarf and stripe viruses identified in a set of reciprocal introgression lines of rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Zhai, Huqu

作者： Zhai, Huqu;Zhu, Linghua;Uzokwe, Veronica N. E.;Xu, Jianlong;Li, Zhikang;Yang, Jie;Zhong, Weigong;Fan, Fangjun;Yang, Jinhuan;Wang, Jun;Zhu, Jinyan;Ali, A. Jauhar;Li, Zhikang

作者机构：

关键词： Field resistance;Rice black-streaked dwarf virus (RBSDV);Rice stripe virus (RSV);Reciprocal introgression lines;Genetic overlap;Allele mining

期刊名称：MOLECULAR BREEDING （ 影响因子：2.589； 五年影响因子：2.75 ）

ISSN： 1380-3743

年卷期： 2012 年 29 卷 4 期

页码：

收录情况： SCI

摘要： Rice black-streaked dwarf virus (RBSDV) and stripe virus (RSV) are the two chronic viral diseases causing great damage to rice (Oryza sativa L.) production in China, and both are transmitted by the small brown planthopper (SBPH, Laodelphax striatellus Fallen). Quantitative trait loci (QTL) affecting field resistance to these two viral diseases were identified using QTL mapping software in a set of reciprocal introgression lines derived from the cross between Lemont and Teqing. A panel of 119 landraces was used for marker confirmation and allele mining. A total of 17 quantitative resistance loci (QRL) for the infection incidences of RBSDV and RSV were discovered and belong to 16 regions on all chromosomes except chromosome 12. Among them, 12 QRL were confirmed by association mapping, and many novel alleles at these loci were mined from the set of landraces. Only one region was found to be responsible for the genetic overlap between the field resistance against RBSDV and RSV, which was reported to be associated with SBPH resistance. The favorable alleles at the above novel and/or overlapping loci should be effective for marker-assisted selection breeding for resistance against the two diseases and the insect. Different strategies of varietal development and effective deployment against the two viral diseases are also discussed.

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